Electrically-heated sad-iron.



No. 671,569. Patented Apr. 9, I90l. J. D. THElSZ.

ELECTRICALLY HEATED SAD IRUN.

' (Application filed Ju] 30 1900.) (No Model.) y

UNITED STATES PATENT EErcE.

JOHN D. THEISZ, OF NEVPORT, KENTUCKY.

ELECTRlCALLY-HEATED SADlRN.

SPECIFICATION forming part of Letters Patent No. 671,569, dated April 9, 1901.

Application filed Iuly 30, 1900. Serial No. 25,303. (No model.)

To all whom t may concern:

Be it known that I, JOHN D. THEIsz, a citizen of the United States, and a resident of Newport, Campbell county, State of Kentucky, have invented cert-ain new and useful Improvements in Electrically-Heated Sad- Irons; and I do hereby declare the following to be a description of the invention suffieiently clear, full, and exact to enable others skilled in the art to which it appertains to make and use the same, attention being called to the accompanying drawings, with the refer-` ence-numerals marked thereon, which form also a part of this specification.

This invention relates toimprovements iu sad or flat irons used for pressing, smoothing, or polishing purposes and which are required to be hot while used and where such heat is supplied by electricity.

The features of this invention concern the construction of the device, with the arrangement and manner of winding of the electrical conductors and the manner of insulating` the sanne.

In the following specification, and particularly pointed out in the claim following it, is found a full description of the invention, together with its operation, parts, au d construction, which latter is also illustrated in the accom panying drawings, in Which- Figure 1 is a side elevation of a fiat-iron, partly in section. Fig. 2 is a top View of the same with parts broken away. Fig. 3 is a horizontal section on line 3 3 of Fig. 1 looking upwardly, so as to show the upper part of the section, it showing also a diagram of the Winding of the wire. Fig. 4 is an end view, and Fig. 5 in an enlarged detail view shows the manner of winding and its insulation.

7 is the core of the heater or iron and is of an alloy or iron only. If an alloy, it contains copper, which forms the larger part of it. It has a fiange S projecting all around, which forms the base of the device and carries the heat to the extreme outer edges thereof. In

Its outer edge is pref- Around this core there is fitted a casing` 1l, around which the electricity-cond ucting wire is wound, and which casing has two flanges l2 12, between which such wire so wound is held compact. The space between these flanges is closed by a shell 13, which covers also the wound wire, and which shell is held in place by resting on flange 8 and is held down thereon by the top plate 14 of the iron. This top plate is held to the core by means permitting its ready removal-as, for instance, by a screw connection 15. To this top plate is also attached thc handle 1G, which attachment is by screws 17, passing through sockets 18 into the ends of the handle.

The electric current from any suitable source (carried by a wire 19) enters the device through one of binding-posts 2l, and after passing through a wire 22, wound around the core in coils, so as to form repeated layers, it leaves again through the other binding-post. These latter are of customary construction and attached and insulated in any approved manner. They are attached to one of anges 12 of the winding-Casin g and project laterally at one of the ends of the iron, thus placing the outer wires in a position where they do not interfere with the manipulation of the instrument. Vire 22 is of a size and material so selected as to present a certain resistance to a certain current, which resistance is sufficiently high to cause said wire to become hot. This wire winding must be insulated from any and all parts of the device, as well as from its own parts, which is done by interposing insulating material 23 between the core and this inner or first layer of coils and interposing thereafter additional layers 23 of such insulating material between each succeeding layer of coils of wire. Sufficient alternating layers of such wire and intervening insulating material are laid on to suit the temperature desired and the voltage required therefor. As such insulating material I use sheet-asbestos or asbestos-paper, upon which the conducting-wire is wound in coils sufliciently apart to prevent touching and so tight as to embed itself to some extent into the insulating material, thereby becoming perfectly and securely insulated. (See Fig. 5.) This insulating material has been omitted in Fig. 3 in order to show the Winding of the wire more clearly. By reason of this tight winding l practically exclude all air, for which purpose I also fill out, preferably with the same material, any space remaining between the wound coil and the inclosing shell. As will be seen, the resistance presented by this current causes the wire to become hot, which heat is transmitted to the inelosing and intervening insulating material and from it through casing ll, which is preferably of brass or other metal freely conducting heat to the inner core. This latter being solid retains well the heat when once thoroughly heated and constantly transmits it to the extreme outer edges of its base 8, and from said base it is transmitted to the polishingplate 9. The winding of the device requires no particular skill and may be quickly and conveniently performed without requiring the aid of an expert, ready access being had by simply detaching top plate let. The provision ol' the removable flanged casing ll, which receives the wire,facilitates greatly the Winding and rewinding of the device. EX tra sets of such wound casings may also be provided, so that in case of burning out of one set another one maybe at once substi tuted without interrupting the use of the inplement.

These irons may be used in series, and rheostats may be interposed to permit regulation of the current and the heat produced thereby.

Having described my invention, I claim as new- In an electrically-heated sad-iron, the combination of a central core having an integral flange S projecting, laterally from its lower edge and even with its under side, forming with this latter the oval base of the device, a

winding-casing having flanges 12, l2 projecting laterally from its upper and lower edges fitted to this core and resting with its lower flange on the flange projecting from said core, the perimeters of all these flanges being parallel to each other, but that of flange 8 projeeting beyond those of flanges 12, an outer shell of even height with the winding-casing and its wall equal in thickness to the projection of flange 8 beyond flanges fitted around these latter flanges and also resting on flange 8 a top plate equal in area to the core as in closed by the windingcasing and surrounded by the outer shell, being even with the ontside of this latter and covering all these parts,screws whereby this top plate is secured to the-central core and whereby it also holds the outer shell in position and down on flange 8, a handle secured to this top plate, alternating layers of electricity-conducting wire and insulating material occupying the space between the outer shell and the windinglcasing and its flanges and means to supply current to this wire.

In testimony whereof I hereunto set my hand in the presence of two witnesses.

JOHN D. THESZ.

Vitnesses:

C. SPENGEL, ARTHUR KLINE. 

